钢纤维增强混凝土桩基厚承台空间拉杆拱传力模型的建立  

Spatial Tie-arch Load-transferred Model for Steel Fiber Reinforced Concrete Piles Caps

作　　者：谷倩[1] 彭波 彭少民 李继祥 

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉430070 [2]湖北工程咨询公司,武汉430071

出　　处：《建筑结构》2003年第5期20-24,19,共6页Building Structure

摘　　要：基于 9个三桩承台和 1 5个四桩承台的模型试验 ,详细分析了承台的破坏形态和力学性能 ,以及钢纤维混凝土 (SFRC)用于桩基承台的优越性 ;通过对SFRC桩基承台模型进行全过程材料非线性计算 ,分析承台的裂缝扩展情况、应力分布规律和传力机理。综合有限元计算和试验研究结果 ,提出了桩基厚承台的空间拉杆拱或软化桁架传力模型 ,为《钢纤维混凝土结构设计与施工规程》The modeling experiments on 9 three pile caps and 15 four pile caps specimen are carried on,the failure state,mechanic characteristic of thick piles cap and the obvious effect of adding steel fibers into concrete are analyzed in detail.In addition,a material nonlinear computation for steel fiber reinforced concrete piles cap model is also executed.The laws of cracks propagation,stress distribution and load transferred rules are analyzed.Through concluding the finite element computing and experimental study achievements,the spatial tie arch or softening truss load transferred model of piles cap are advanced,which provides theoretic support and experimental basis for compiling the Specification for Technology of Fiber Reinforced Concrete Structures .

关 键 词：桩基 承台 钢纤维混凝土 非线性 有限元 力学性能 模型试验 

分 类 号：TU473.13[建筑科学—结构工程]